| Tournament details | |
|---|---|
| Dates | August 20–August 24 |
| Teams | 8 |
| Final positions | |
| Champions |  Hsi Nan Little LeagueTaichung, Taiwan |
| Runner-up |   San Ramon Valley Little LeagueDanville, California |
The 1991 Little League World Series took place between August 20 and August 24 in South Williamsport, Pennsylvania. In the championship game of this 45th Little League World Series, the Hsi Nan Little League of Taichung, Taiwan, defeated the San Ramon Valley Little League of Danville, California.